Getting started

From zero to your first generated image in about five minutes.

Create a Capci account

Go to capci.app and sign in with Google, one click, no card required. This gives you the free tier by default.

Try it free, or upgrade for more volume

The API and MCP server work on a Free account too, as a bounded one-time trial from the same 50-creation lifetime pool the web app uses. Pro and Developer both get a real recurring monthly quota (200/mo and 900/mo). See Pricing for what each tier includes.

Generate your API key

In the app, go to Dashboard → Account → API & MCP and click Generate API Key. The key is shown once, at creation. Copy it somewhere safe immediately, since Capci never stores it in plain text and can't show it to you again. Generating a new key immediately invalidates the previous one.

capci_live_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Set your defaults (optional, Developer plan)

On the Developer plan, the same API & MCP card lets you set fallback theme / size / diagram style so that any API or MCP call that omits those fields uses your preference instead of the system default. Every field can still be overridden per-call. Not available on the Free trial.

Make your first request

Any authenticated GET is a safe way to confirm your key and plan are both active before you spend a generation call:

curl https://api.capci.app/api/v1/brandkit \
  -H "x-api-key: capci_your_api_key"
# → 200 { "assets": [ { "id": "linkedin-cover", "title": "...", "w": 1200, "h": 627 }, ... ] }
# A 200 here confirms your key + Developer plan are both active.

Generate something real

Pick a resource to dive into: Diagrams, Posts, or Charts & other tools, each with a full request/response reference and copy-paste samples in cURL and Python.

Prefer to let an AI agent do the calling? See MCP server: the same key works there too.